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参数资料
| 型号： | KITMPR084EVM |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 34/40页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL 8-PAD TOUCH MPR084 |
| 标准包装： | 1 |
| 传感器类型： | 触摸，电容式 |
| 接口： | I²C |
| 电源电压： | 1.8 V ~ 3.6 V |
| 嵌入式： | 是，其它 |
| 已供物品： | 板，缆线，CD |
| 已用 IC / 零件： | MPR084 |
| 产品目录页面： | 2808 (CN2011-ZH PDF) |
| 相关产品： | MPR084EJR2CT-ND - IC CTLR TOUCH SENSR PROX 16TSSOP MPR084QR2-ND - IC CTLR TOUCH SENSOR PROX 16-QFN MPR084Q-ND - IC CTLR TOUCH SENSOR PROX 16-QFN MPR084EJR2TR-ND - IC CTLR TOUCH SENSR PROX 16TSSOP MPR084EJ-ND - IC CTLR TOUCH SENSR PROX 16TSSOP |
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MPR084
Sensors
4
Freescale Semiconductor
2
External Signal Description
2.1
Device Pin Assignment
Table 3 shows the pin assignment for the MPR084. For a more detailed description of the functionality of each pin, refer to the
appropriate chapter.
The two packages available for the MPR084 are a 5x5mm 16 pin QFN and a 4x5mm 16 pin TSSOP. Both of the packages and
their respective pinouts are shown in Figure 3.
Figure 3. Package Pinouts
2.2
Recommended System Connections
The MPR084 Capacitive Touch Sensor Controller requires ten external passive components. When connecting the MPR084 in
a touch sensor system, the electrode lines must have pull-up resistors. The recommended value for these pull-ups is 780k
.
Some electrode arrays will require higher or lower values depending on the application.
In addition to the 8 resistors a bypass capacitor of 1F should always be used between the VDD and VSS lines.and a 4.7
k
pull-up resistor should be included on the IRQ.
Table 3. Device Pin Assignment
Pin
Name
Function
1ATTN
Attention Pin. Input, active low, when asserted sets the Configuration Register’s DCE bit high
allowing communication with the part.
2IRQ
Interrupt Request Pin. Output, active-low, open-drain interrupt request signaling new events.
3
VDD
Positive Supply Voltage
4
VSS
Ground
5SCL
I2C Serial Clock
6SDA
I2C Serial Data
7
AD0
Address input. Low = slave address 0x5C. High = slave address 0x5D.
8
SOUNDER
Sounder driver output. Connect a piezo sounder from this output to ground. Output is push-pull
9 - 16
E1, E2, E3, E4, E5,
E6, E7, E8
Touch Pad Electrode connections.
PAD
Exposed pad
Exposed pad on package underside (QFN only). Connect to VSS.
E1
E2
E3
E4
E5
E6
E7
E8
VDD
VSS
SCL
SDA
AD0
SOUNDER
ATTN
IRQ
3
4
1
2
10
9
12
11
78
56
14 13
16 15
E1
E2
E3
E4
E5
E6
E7
E8
VDD
VSS
SCL
SDA
AD0
SOUNDER
ATTN
IRQ
1
4
3
2
5
8
7
6
16
13
14
15
12
9
10
11
QFN
TSSOP
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